Too young for any of the Scout groups and the Judo club near us is full of little bruisers, so I'm pretty sure that despite the insistence it's a self defence discipline, judging by the parents that drop their kids off literally with the Staffies on chains and ten dozen Jaydens and Chardonnays hanging off the pushchair, it looks like breeding ground for kids who want to learn fighting not conflict restraint.
Is 4 too young perhaps, having only just started Reception this September?
Which out of school activities does your 4 year old son attend, if any?
Thankyou :)